Disease on crop
fungalLate Blight on tomato
Phytophthora infestans
The pathogen responsible for the Irish Potato Famine. Devastating in cool wet weather; can destroy a tomato planting in days.
- Disease
- Late Blight
- Pathogen type
- Fungal
- Crop
- Tomato
- Scientific name
- Phytophthora infestans
Late Blight on tomato
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Symptoms on tomato
- ▸ Water-soaked olive-green to brown lesions on leaves and stems
- ▸ White fuzzy mold on leaf undersides in humid conditions
- ▸ Brown patches on fruit, firm at first then collapsing
- ▸ Whole-plant blackening and collapse
IPM controls
- ✓ Plant resistant varieties (Mountain Magic, Mountain Merit, Iron Lady, Defiant)
- ✓ Source clean potato seed and tomato transplants
- ✓ Destroy volunteer potatoes and any infected plants immediately (do not compost)
- ✓ Wide spacing and pruning for airflow
- ✓ Preventive copper sprays in high-risk regions
Resistant varieties
Mountain Magic Mountain Merit Iron Lady Defiant
Other crops affected by late blight
Related